Method of manufacturing ball rolling disks



li'atented Apr.

HENBY fneoi'mrin HEATHCOTE,

'#UMTEW 'flfe Url;

i begENTn-f; meri-e, 'issmtafio A: EWHITWOE--T1-1 LIMITED; or CQVENTRYPENGLAND, ki*

lThis vinwf'ention'relates to f'the manufacture of balls for bearings'fandpartieularly-to theipro'du'ction and/or restoration of applL anc'efs'byjmeans lof Wh'chrou'ghly formed baltblanks'ware brought to a' de'sired state of finish. a

'In such manufacture: -v rough V spherical blanks'are form-ed by any oonvenientmeans, vsucha's hot'or coldfforglng or turnmg from the :bar and a'compar'ativ-ely inexpen'sive and quick' method fofv brin'ging ithese blan'ks 'to va sn'ioothand approximately Vspher'ical condit ion is' by rolling b-etween'two' hardened stee] disks provided'with'concentric and c'omple4`4 mentary fg'roo'ves? preferably'of `approxiA mately semi-clrc'ular section, which grooves i hav'etheir Vsurface trave'rsed by a'SuCCesSOn sent ,coiisiderable difliculties, as

of'l edges produced by outting or ,forming small adjaeentf*'furrows, or; hannels trans; erselyi from one edge vto V,theother of the grooveeither at' right 'angles or-inclined to theedges o'r'sides. Th'ejmanufacture of suitable disks having grooves therein which... arechannelled uponV their surfac'es ,has beenl foundto pre; WarpingV is Vvery 'lik'ely to V`oc'cnr asfthe result of the hardening process to which the discs must be subjeeted. The channeling ovfthe surface ofythe'grooves is also, foun'dfto deteriorate if'erf rapidly in fuse and'first along those Hpartsfof the grooves which stand `'higher V and/or rectificationof disks or other applil forined thereon,-then 'if' necessar'y truing the aLXia-ll) th an other parts.

The object of the present inventionisto oVe'rcoIne i the foregoing difficulties and' to provide nnprovements 1n` the production anees for rolling or otherwise finishin the aforesaid rough blanks for bearing` ba ls. o

' The 'invention consists in a method of pre-' paring 'hardeified channeled surfaces' for Vrolling orv otherwisel forming the channels in the already'hard ened surfaces of the grooves.

The invention further conslsts 111 brlnging the disks to their hardened' state either beforeI or ,after the concentrie vgrooves'` are i orvlike hardening -disks or like appliances 'provided 'With'one or more grooveshaving Referrin or less'idiagramniatic drawing's f ,V

'a' portlon fof a'dlsk apphanceV in accordance'Withglthls v V i Fig.. l 's a plan of inv'entiomalid* y V R'UDGE? ke'rooves by 'rumiinggI thevdisks' with'balls in VIn the'accompanying'* drawlings, .W hicli;

show.` disk in` aeco'dance Withfthe invention',`a-is a. disk ofstee'l of suitable character having Whichare `f'o'rined an a. flat' surface iii desired number-l of -Jan'nul'ar igrooves 0.

The grooves c. are; conoentric e-With 'one i another' and With-1 the' centre offfthe disk a, and'theverossesection"'ofthese grooyes 0v is'j pfiefe'rably seniicireularg-as' shown in'Fig'i me v i Thel 'disk vhas a'fellow' diskl (not 'shown face fwith comiplementar'yv groovesisimila'r to the grooves c formed thereinv p fThe two disks are ``subjeC/[ed Sto' suitable prooesses,' and inithe l'event of any warping`or like distort'i/o'n V:resulting ning' the disks With balls p grlnd-in'g or by any other eonvenlent'method,

the twofd'islfs' being so treated 'that'wheii.f fiv applied toy one another 'they provide fann'ular grooves of a suita-ble'cross-section for froll-V Ingthe bearlngballs which/it is'de'sl'red to f produce;

, When' Vcomplete'dj'l the fdiskS ille H,covered Withlv acidresistingf; material Vand blivntesi, as shown at e Fig. il, are s'c'ratchedthro'ug'h the acid' re'sist the grooves center of the co'ncentric grooves. 4 The diske from one' 'Side to Vthe 'ot-her. of

andV at a7 s'light;l inclination toradial4 lines which* would pase v through 'the are then immersed inzfor the grooves `lfilled;l With, an etching solution which may coni-fV veni-ently Cupric chlorideT V1'0 grams; Water, eubie centimeters;nitric acid, 1.4 s'pecific gravity,

l30 cubic centimeters.4

After' asuitable treatment the etching solution nia be removed to seey What' progress' has 'been'mad-e and so'long' as this 'is have 'the f(')lloWi1 1g.` properties V as indicated.

view to ascertaining the insufificient for the purpose Vthe disk is again re-coveredwith eaching solution. Generally speaking, the grooves lWouldrbe filled about five orl sixV times and then inspected with a progress, but any suitable modification may respect in accordance with the existing conditions. i V

The etching process results in the formation of edged furrows or channels across the surface of the grooves c along, the lines ee. When these channels are of the neces-v sary depthrthe disksare made ready for use by neutralizing the etching` solution and rc- The above descrlptio'n refers to the Vmakingvof new disks or ,the like butvthe etching process for produclng the necessary channels lnrthe surface-of the grooves may be einployed with lequal advantage for renew-V ing or reproducing channels in grooves which have become Worn as the result of continued use, the grooves being` if necessary first reotified to the desired shape by any wconvenient means and the channels being forme'd by coating the disks WithV acidresist material, vscratching and subjecting themto the etching process as already de-V scribed.

Although described With reference to the making of channels in grooves for the manufacture of bearing balls, it is to be understood that the invention is not restrictedV to this purpose and that it may be employed for the production of suitable sharp edged channels or furrows in any grooved or other surfaces whichV may be used for theimanu- Claims': 1,

1. Av methodof preparing hardened disks or like appliances for finishing` rough blanks for bearing' balls or the like, comprising formin'n' one or n'ioreconcentric grooves in said diske, sulojectin;r said disks to a hardeningf process and then'to any necessary truing or rcctifying` of the said grooves as by run- ,ninaV` with balls in position, grinding or the like, and finally formingT sharp-edged channels across the surface ofv the groove or groovcs by etchinfr. V V

2. A method of preparing` disks with chanueled surfaced `,f i'rooves for treating bearing' balls or the like, coinprisine` sh apinnj and leroovin'ef said disks, suitablv hardeninn" the nccessary surfaces thereof, rectifying be effected in this facture or finishingf of articles by a process surfaceag'ainst removal, and etching' any irregularities in the hardened surfacesV of the grooves, and then etchingV channels With sharp edges in the said surfaces.

A Vmethod of prreparing disks With channeled surfaced grooves for treating bearing balls or the like, 'coinprising shaping` and grooving said disks, suitably hardening` the necessary v nina; said disks With vballs or the like in position therein, so that, any irregularities in the hardened surfaces of the grooves are rectifiech' and then V employingz an etching operation to forin channels across the snrfaces of the groovesfor the purpose 'of providing cuttingvedges therein. p L

4.' A method' of preparing 'disksmwith chamieled surfaced grooves l. for treating bearing` balls or the like, comprsingl shaping' and grooving said vdisks, suitably hard,- ening the' necessary surfaces thereof, rectifying'V any irregularities surfaces of the gro'oves', employing anyacid resist in such a manner as to protect certain areas of said surfaces,jand then' applying an acid solution to said grooves to etch channels inrfthe unprotected'V partsv without yremoval of the protected areas.

* 5. A method ofpreparing disks with channeled surfacedv groovesf-for treating bearing balls or' the like, comprising` shapiug and grooving said diske,-suitablyhardening the necessarysurfacesthereof, rect-ifying any irregularities'in the hardened surf facesV of the grooves,'employing an acid resist in such a manner aslto protect certain areas of said surfaces and then applying` and channels crossinnj the grooves,rcompr1sins; hardeuinp: the grooves. truing Vthe Q'roovcs* after hardening, applying -an acid resist to the trnedsurface, removin'g' transvcrsc areas off-the resist, and etchingfaway the uncovered metal, without disturbinp; the covered parts to form channels with intervening' strips of trued surface having` cuttine edgcs. s V

in testimony Whcreof I have signed nu? name to this Vspccilication.

With

surfaces thereof, run-I iny the hardened' nia-any LEONARD L`n na,Ti-ico'rn t 

